LF364002_RPT_E - Brighton LOPA Review

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Local Fuel UK Ltd – Shoreham Oil Terminal
Gasoline Ship Import – Layers of Protection Analysis
P & I Design Ltd DOCUMENT NO: LF364002_RPT
2 Reed Street, Thornaby, UK, TS17 7AF
Tel: + 44 (0)1642 617444
Fax: + 44 (0)1642 616447
Project: Originator: DSR DSR
Client: Checked: DRR DRR
Client Ref: Approved: Client Client
Document: Issue: A B
Date: 10/12/2014 30/03/2015
Title:
Initiating
Event
Frequency
IEF
Conditional
Modifier 1
Conditional
Modifier 2
Conditional
Modifier 3
Conditional
Modifier 4
Conditional
Modifier
(Others)
Protection
Layer 1
Protection
Layer 2
Protection Layer
3
Protection
Layer 4
Mitigation
Layer 1
Total PFD for
all PL's
Frequency of
IEF x PL's
Description
Overfill of gasoline tank during import
from a ship leading to explosion, fire
and a release to the harbour,
corresponding to a potential short-
term major environmental
consequence.
Probability of
required
meteorological
conditions
Probability of
ignition
Probability of
bund failure
Probability of
release from site
ATG and
Operator
Action
Cross Check:
Quantities
transferred
from pipeline is
compared to
quantity to be
exported.
High High Alarm
and independent
shutdown of
tank import
Failure to
detect and
stop overfill
Description
IE No. Initiating events Events/year
1
Incorrect line up
3.74E-03 2.00E-01 5.00E-03 1.00E+00 1.00E-03 3.74E-06
2
Incorrect Ullage in receipt tank. (Not
enough ullage to take full import
quantity) 2.74E-03 2.00E-01 5.00E-03 1.00E+00 1.00E-03 2.74E-06
3
ATG Failure (Sticks or reads low) and
operator does not pick this up.
2.14E-04 1.00E-01 5.00E-03 1.00E+00 5.00E-04 1.07E-07
Total of Initiating Events
= IEF1 + IEF2 + IEF3 + IEF4 + IEF5 + IEF6 + IEF7 + IEF8 +
IEF9 + IEF10 + IEF11
6.70E-03 0.03 1.0 0.8 1.0 6.59E-06
1.0E-06 LOPA Calculation
1.61E-04
Frequency of Unmitigated Consequence (per year) = Initiating Event Frequency (IEF1 + IEF2 + IEF3 etc) x Conditional Modifiers (CM1 x CM2 x CM3 etc)
1.58E-07
Frequency of Mitigated Consequence (per year) = CM x {(IEF1 x PL1 x PL2 x PL3 etc) + {(IEF2 x PL1 x PL2 x PL3 etc) + {(IEF3 x PL1 x PL2 x PL3 etc) ............}
Yes
Incident Frequency= (IE1 x PL1 x PL2 x PL3 x PL4 x PL5) + (IE2 x PL1 x PL2 x PL3 x PL4 x PL5) + (IE3 x PL1 x PL2 x
PL3 x PL4 x PL5) + (IE4 x PL1 x PL2 x PL3 x PL4 x PL5)
+ (IE5 x PL1 x PL2 x PL3 x PL4 x PL5) + (IE6 x PL1 x PL2 x PL3 x PL4 x PL5)
Frequency of Consequence mitigated by conditional
modifiers but not by protection layers
Risk Tolerance Criteria
LOPA Summary
Conditional Modifiers = CM1 x CM2 x CM3 x CM4
0.024
P & I Design Ltd - LOPA Calculation (Multiple Initiating Events)
Frequency of Mitigated Consequence
Risk Tolerance Criteria Met
Shoreham LOPA Review (Environmental Case - Fire)
LOPA Review
Local Fuels
Shoreham Oil Terminal
LF364003_CAL
Scenario